Sandpapering and polishing machine.



No. 854,625. PATEN'TBD MAYm, 1907. M. L. BEAL.

SANDPAPERING AND POLISHIN AGHIN B.

APPLIO ATION FILED JAN. 23, 1

2 SHEETS-SHEET l.

No. 854,625. PATENTED MAY 21, 1907.

M. L. BEAL. SANDPAPERING AND POLISHING MACHINE.

APPLIOATION FILED JAN. 23, 1906.

2 SHEETS-SHEET 2.

\1 WWW? 1 [NVENTOR WITNESSES: ifL.,Bea Z Axiom) UNITED STATES I PATENT OFFICE.

I MICHEAL L. BEAL, O'FPASeDEN-A, CALIFORNIA. SANDPAPER'ING AND POLISHING MACHINE.-

Specification of Letters Patent.

Patented May 21, 1907.

Application filed January 23,1906. Serial No. 291499.

To alt uhp m it may/"concern.- Be it known that'I, MICHEAL L. BEAL, a citlzen'of the United States of America, re-

siding at Pasadena, in the county of Los Angeles and State of California, have invented new and useful Improvements in Sandpapering andPolishing Machines, of which the fol lowing is aspecification. p

This invention relates to a sand papering and polishing machine forsand papering and polishing floors lumber and the like. I Thelobject of the invention is toprovide a simple, effective and easily operated device of this character which may be readily moved along the surface to be sand p'apered or polished or held fixed while a board to be treated is moved relatively thereto, be conveniently adjusted to regulate the pressure of the sand papering or polishing In the accompanying drawings :Figure 1 showsin" side elevation a sand paperin or polishing machine constructed in accordance with my invention. Fig. 2 is an end elevation of the same. Fig. 3 is a vertical cross section on line 33 of Fig. 1.

Thenumeral'l in the drawing designates a supporting frame or carrier, 'preferabl of oblong rectangular form, and provide at each of its corners with casterwheels or rollers 2 carried by supporting standards 3 operatively connected with screw shafts 4 mounted upon the carriage and provided at their upper endswith actuating crank handles 5. By this construction the frame or carriage may be raised and lowered relative to the surface 6 which is to be sand papered polished and on which the wheels or rollers 2 travel, as

will be readily understood.

Journaled upon the frame are transverse shafts 7 carrying guide sheaves or pulleys .8; around which travels an endless beltor band 9 provided upon its outer face with an actingmaterial 11, composed of sand paper or some other suitable abrading, smoothing or polishing substance or material, thus forming a rotary dressing belt.' For polishing purposes,

.FiXe'd' upon the shafts 7,816 drive pulleys 12 engaged by drive belts 13 operated by an electric or other motor 14 centrally supported upon. the upper portion of the frame, the drive belts passing around pulleys 15 on the i motor shaft. Through the action of the motor and drive gearing just described motion and which may is' communicated to the dressing belt 9, as

will be readily understood.-

The lower horizontal'stretch of the dress- 2 ing belt is designed to be moved in contact with the surface 6to be dressed, and its pressure thereon may be regulated through the instrumentality of a press'er shoe or member 17 disposed between the pulleys 8 and arranged to bear against the inner surface of the said lower stretch. The shoe is attachedto the lower end of a verticlly adjustable frame comprising side standards 18 connected at their upper ends by a cross bar 19 and slidabl connected in any suitable manner with t e frame. The main frame 1 has a superposed frame portion 20, between which and the cross bar 19 are arranged one or more Presser-springs 21 arranged to bear against a bar or member 22adjustable through the medium. of one or more adjusting screws 23 mounted upon the said supefgosed frame portion 20. The spring 21 s the frame 18 and shoe 17 downward to cause the latter to bear with'yielding pressure on the lower or working stretch of the dressing belt, the

pressure of which on the surface 6 to be. dressed may be'regulated asde'sired by vary-' ing the resistance of the spring. I

An operating handle 24 is rovided to enablethe machine to be pushe or pulled along the surface and transported from lace to place and in operation it will be un erstood that as themachine is moved alon the surfacefi the working stretch of the be t will en- 7 gage and sandpaper or polish-the same. I twill be obviousfrom the foregoingde scription that a simple and effective construction of machine is provided for sand pampering, polishing orotherwise dressing oors, lumber'or other surfaces, and onethat is susceptible of'convenient manipulation.

In polishing or sand papering floors and other fixed surfaces, the machine is drawn or ushed along the surface and may be steered v y swinging the frame in one direction or the other on the caster wheels 2. In dressinglumber and other portable articles, the

Y casters may be removed'andthem'achine attached to asuitable'ta'ble or support rovided with automatic means for fee 1n t e board Ice beneath the working surface of t e dressing belt.

Having thus described, the invention, what is claime as new,is:

1. A machine of ,the character described comprising a frame, wheeled sup comprising a frame, wheeled sup orts for the frame, means for vertically a justing the frame on said supports, guides upon the frame, a traveling dressing belt movable around said guides, a shoe arranged between the guides for exerting pressure on the work ing stretch of the belt, springs acting on the shoe, a pressure regulating element bearing on the springs, and a screw shaft for adjusting said pressure regulating element.-

2. A machine of the character described orts for the frame, means for vertically a justing the frame on said supports, guides upon the frame, a traveling dressing belt movable around said guides, a shoe arranged between the guides for exertin able carrier frame supportin said shoe,

springs for imparting downwar ressure on said frame, the latter being provided with a 4 head bar against which the springs bear,

and

f a screw shaft acting on the bar for compressing said springs to regulate their pressure on the shoe.

around said guides,

' springs interposed pressure on the working stretch of the belt, a vertically adjustin presence of two frame on said supports, guides upon the frame, a traveling dressing belt movable a shoe arranged between the guides for exerting pressure on the working stretch of the belt, a vertically adjustable carrier frame sup orting saidshoe, said frame being providbd with a head piece, a movable bar arran ed above said head piece, etWeen the bar and head piece, and a screw shaft acting on the bar for compressing said springs. to regulate their pressure on the shaft.

. 4. A machine of the character described comprising a frame, wheeled sup orts for the frame, means for vertically a justing the frame on said supports, guides upon the frame, a traveling dressing belt movable around said guides, a shoe arranged .between .the guides for exerting pressure on the working stretch of the belt, spring means exerting pressure on the shoe, and means for regulat-1 ing the pressure thereof. In testimony whereof, I affix my signature witnesses.

MICHEAL L. BEAL.

Witnesses:

O. H. PARSONS, MAUD H. BURTT. 

